A new quick start is available that demonstrates a custom DB log handler that writes the Teiid command log messages to a database. 

Look here for information on the quick start:

https://docs.jboss.org/author/display/teiidexamples/Command+Logging+using+Custom+DBMS+Appender

It maybe nice, in the future, to include an example for audit logging.

If you have any questions or problems, please ask.

Van